|Publication number||US4508138 A|
|Application number||US 06/520,639|
|Publication date||Apr 2, 1985|
|Filing date||Aug 5, 1983|
|Priority date||Aug 5, 1983|
|Publication number||06520639, 520639, US 4508138 A, US 4508138A, US-A-4508138, US4508138 A, US4508138A|
|Inventors||Robert W. Dixon|
|Original Assignee||Chas. M. Bailey Co., Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (33), Classifications (20), Legal Events (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
A polyjet valve has an inlet opening into an inlet chamber normally communicating through various polyjet openings in a cylindrical sleeve in variable amounts in one direction toward an outlet chamber having an outlet. There is a traveling ring surrounding the sleeve and movable to close the openings and an annular channel in the traveling ring to establish backflow from the outlet chamber progressively through different openings in the polyjet sleeve and into the annular channel open to some of said openings in the reverse direction and then to waste.
The most pertinent prior art known to me presently is U.S. Pat. No. 3,605,787 issued Sept. 20, 1971 to Ralph J. Krogfoss and myself for a polyjet valve. This valve is a fundamental portion of the current disclosure, but does not have any indication of the currently disclosed manners of maintaining, cleaning and backwashing the valve.
FIG. 1 is a longitudinal cross-section on two planes at right angles to each other through one form of polyjet valve according to the invention showing provisions for a backwash operation.
FIG. 2 is a similar cross-section of another form of polyjet valve pursuant to the invention showing another form of arrangement for effectuating a backwash function.
In the embodiment shown in FIG. 1 there is provided a valve body 6 made up of various component portions having an inlet 7 opening into an inlet chamber 8 and communicating with an outlet chamber 9 having an outlet 11. Intermediate the chambers 8 and 9 there is a polyjet sleeve 12 symmetrical about a longitudinal axis 13 and inclusive of a very large number of jet openings 14, preferably of tapering cross-section, with the wider or larger portion toward the outside of the valve and the smaller or narrower portion toward the inside of the valve. These are axially spaced and extend radially and circumferentially in a pattern preferably as disclosed in U.S. Pat. No. 3,605,787.
The sleeve is preferably supported at one end through a ring 16 in engagement with a nose cone 17 joining the remainder of the body by means of intervening vanes 18 spaced apart to allow free fluid flow. The walls of the chamber 8 merge with an inlet flange 19 for securing the body 6 to an adjoining hydraulic conduit (not shown) by means of the customary fastenings. The outlet chamber 9 is within a portion of the main body 6 having an attachment flange 21 with a provision for securing the body 6 to another structure such as an outlet conduit. The body 6 also incorporates flanges 23 and 24 held together by bolts 25 so as to afford a detachable assembly.
Movable over the outside of the sleeve 12 is an axially traveling ring 26 inclusive of bearings 27 and 28 movable on the outside of the sleeve, the bearing 28 being provided with a packing or O-ring 29. The ring bearings 27 and 28 are supplemented by a bearing ring 31 secured to the traveling ring 26 by removable fastenings 32 and having an anti-friction lining 33. To move the traveling ring 26 there is provided an internally threaded sleeve 34 secured to the ring and in interengagement with a screw 36 that is rotated by a driver 37, shown diagrammatically.
Preferably there are two diametrically opposite ring moving devices such as the sleeve 34, the screw 36 and the impeller 37. Intermediate such devices, preferably also on a diameter, are tubes 41 at one end tightly secured to the ring 26 by means of a packing ring 42 and a fastening hub 43. The tube 41 extends slidably through a packing structure 44 and telescopes into a drain chamber 46 incorporated within the body 6 and having a drain opening 47 controlled by a manual valve 48.
In the normal operation of this structure, fluid under pressure is introduced through the inlet 7 and flows in the direction of the arrow 51 into the annular space between the wall of the body and the inner sleeve 12. In the event one or more of the openings 14 is uncovered, the liquid then flows through the openings 14 to the interior of the sleeve 12 and then flows in an axial direction to the outlet chamber 9. From there, flow continues through the outlet 11 usually into a connected pipe or conduit 58 controlled by a normally open valve 59, the outlet flow being in the direction of the arrow.
When the actuating drivers 37 are energized, the screws 36 are rotated and the threaded sleeves 34 and the traveling ring 26 are moved axially, either to uncover additional ones of the openings 14 or to cover some or all of the openings. By thus traversing the traveling ring 26 in an axial direction, the amount of flow through the valve can be controlled, depending upon the number of the openings 14 that are made available.
While the valve operates admirably for the control of flow quantities under most all circumstances, there are some installations in which there is sufficient debris in the liquid to clog the openings 14.
To overcome the difficulty a special provision is made. There is an arrangement for backwashing the openings. The flow direction is temporarily reversed. To arrange for backwashing, the valve 59 is easily closed to seal off the outlet 11. Liquid from the inlet chamber 8 is directed to flow through a shunting line 61 through a control valve 62 to the closed off outlet chamber 9. The shunted liquid flows through the center or interior portion of the polyjet sleeve 12 and radially outwardly through the openings 14 in a direction the reverse of normal flow. Fluid flows through the then-exposed ones of the openings 14 into an annular groove 63 within the traveling ring 26. Flow is from that groove 63 through the tubes 41 into the draining chamber 46 and from there through the outlet 47, since the valve 48 is correspondingly opened. This outflow goes to waste. By traversing the axially relatively short or narrow annular groove 63 over the longer array of openings, the flushing pressure is concentrated on a few holes at a time affording good cleansing action. By traversing the traveling ring along the length of the polyjet sleeve 12, all of the openings 14 are sequentially are exposed to the backflow liquid. The entire sleeve 12 is thus purged of any debris. The control valves can be returned to normal positions and the usual flow can be resumed.
In the embodiment of the invention disclosed in FIG. 2 there is similarly provided an inlet 71 to an inlet chamber 72 at one end of a valve body 73 made up of various different portions. The inlet chamber 72 extends around a sleeve 74 movable along an axis 75 by means of an axial propelling rod 76. The rod extends through a bearing and packing gland in an end plate 77 secured to a separable part of the body 73 and connects to an actuating structure 78. The rod 76 can be moved to and fro and the sleeve 74 moves with it. The sleeve 74 is joined to a coaxial polyjet sleeve 79. The polyjet sleeve 79 for much of its length is provided with a number of individual polyjet openings 80 usually affording flow from the inlet chamber 72 into the interior of the polyjet sleeve 79. This usually is in communication with an outlet chamber 81 having an outlet 82 adapted to be secured to any connecting structure (not shown) and preferably is provided with a closure valve 83.
The valve body 73 is inclusive of an enclosed annular groove 84 surrounding a fraction of the oxide length of the polyjet sleeve 79. From the annular groove 84 is an outlet 86 controlled by a valve 87 and going to waste.
There is a shunt line 88 having one end connected through an opening 89 to the inlet chamber 72 and having its other end going through an opening 91 to the outlet chamber 81. A valve 92 regulates or controls flow through the shunt line 88. The sleeve 74, opposite the end connected to the polyjet sleeve 79, has a terminal flange 90 slidable in a cylinder 93 compressed between the valve body 73 and the end plate 77. A bearing ring 94 carrying an O-ring and abutting an O-ring affords a substantially non-leaking arrangement.
In the normal operation of this structure, pressure fluid from the inlet chamber 72 flows through whatever openings 80 are available or uncovered. Flow is then into the interior of the polyjet sleeve 79. When the valve 83 is open, flow continues through the outlet 82. The valves 87 and 92 are normally closed, so there is no shunt flow and no flow to waste. In order to accomplish backwashing, the waste valve 87 is opened, the outlet valve 83 is closed and the shunt valve 92 is opened. Pressure fluid from the inlet chamber 72 then passes through the opening 89 and through the shunt line 88 and through the opening 93 into the chamber 81. There is then flow radially outwardly through whatever small number of the openings 80 are momentarily in communication with the relatively narrow annular groove 84. This flow through the openings 80 is contrary to the normal direction of flow. The outflow into the annular groove 84, as the polyjet sleeve 79 is moved axially to and fro, goes out to waste through the temporarily open valve 87. In this way a few at a time of the various openings in the polyjet sleeve are individually and progressively subjected to a liquid pressure flow through them contrary to the normal direction of flow. Debris lodged therein due to flow in the normal direction is subjected to a reverse flow and is dislodged and discharged from the outlet 86.
|Cited Patent||Filing date||Publication date||Applicant||Title|
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|U.S. Classification||137/239, 251/205, 210/411, 210/427, 137/625.3, 138/46, 251/210, 137/625.38, 251/121, 137/546, 138/45, 137/625.39|
|Cooperative Classification||Y10T137/86734, Y10T137/8013, Y10T137/86799, Y10T137/4252, F16K47/04, Y10T137/86807|
|Aug 5, 1983||AS||Assignment|
Owner name: CHAS. M. BAILEY CO., INC., A CA CORP.
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DIXON, ROBERT W.;REEL/FRAME:004161/0792
Effective date: 19830802
|Oct 3, 1988||FPAY||Fee payment|
Year of fee payment: 4
|Oct 7, 1993||FPAY||Fee payment|
Year of fee payment: 8
|Oct 7, 1993||SULP||Surcharge for late payment|
|Apr 5, 1994||DP||Notification of acceptance of delayed payment of maintenance fee|
|Nov 5, 1996||REMI||Maintenance fee reminder mailed|
|Feb 28, 1997||FPAY||Fee payment|
Year of fee payment: 12
|Feb 28, 1997||SULP||Surcharge for late payment|